Client.java

import java.io.*;
import java.net.*;
import java.awt.Point;
import java.util.List;

public class Client {
    public static void main(String[] args) {
        Socket socket = null;
        ObjectInputStream objectInputStream = null;

        // Retry logic: Try to connect to the server a few times before failing
        int maxRetries = 5;  // Maximum number of retry attempts
        int retryInterval = 2000;  // Wait time between retries in milliseconds (2 seconds)
        int attempts = 0;

        while (attempts < maxRetries) {
            try {
                // Try to connect to the server
                socket = new Socket("localhost", 12345);  // Connect to server on port 12345
                System.out.println("Connected to server.");
                objectInputStream = new ObjectInputStream(socket.getInputStream());
                break;  // If connected, exit the loop
            } catch (ConnectException e) {
                attempts++;
                System.err.println("Failed to connect to the server. Attempt " + attempts + " of " + maxRetries);
                if (attempts < maxRetries) {
                    System.err.println("Retrying in " + (retryInterval / 1000) + " seconds...");
                    try {
                        Thread.sleep(retryInterval);  // Wait before retrying
                    } catch (InterruptedException ie) {
                        System.err.println("Retry interrupted.");
                    }
                } else {
                    System.err.println("Could not connect to the server after " + maxRetries + " attempts. Exiting.");
                    return;  // Exit the program after max retries
                }
            } catch (IOException e) {
                System.err.println("An I/O error occurred: " + e.getMessage());
                e.printStackTrace();
                return;  // Exit if there's an I/O error
            }
        }

        try {
            // Process incoming data from the server
            while (true) {
                try {
                    // Read the list of click positions from the server
                    List<Point> clicks = (List<Point>) objectInputStream.readObject();
                    System.out.println("Received clicks from server: " + clicks);
                } catch (EOFException eof) {
                    // Server has closed the connection
                    System.out.println("Server closed connection. Exiting.");
                    break;
                } catch (SocketException se) {
                    // Handle the case when the connection is reset (e.g., server closes the socket)
                    System.err.println("Connection with the server was reset. Exiting.");
                    break;
                } catch (ClassNotFoundException e) {
                    System.err.println("Class not found while reading data from server.");
                    e.printStackTrace();
                }
            }
        } catch (IOException e) {
            System.err.println("Error while communicating with the server: " + e.getMessage());
            e.printStackTrace();
        } finally {
            // Clean up resources
            try {
                if (objectInputStream != null) {
                    objectInputStream.close();
                }
                if (socket != null) {
                    socket.close();
                }
            } catch (IOException e) {
                System.err.println("Error while closing resources: " + e.getMessage());
                e.printStackTrace();
            }
        }
    }
}